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Gold/Mining/Energy : Gold Price Monitor
GDXJ 117.61+3.0%Dec 19 4:00 PM EST
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To: IngotWeTrust who wrote (74374)8/2/2001 3:21:51 PM
From: E. Charters  Read Replies (1) of 116816
 
Acids are dangerous. HF especially since it is a tad reactive and poisonous too. Never get it in a cut. Diamond drillers are quite blithe with 40% HF but I would be much more careful if I were them.

If you ever want to cut out from the madding crowd quick just spill 100 mills or nitric acid on the hotplate. It will be painless. I had left a 40 mil nitric-hyrochloric on the hotplate with a stopper in the erlenmeyer by accident. The fume hood window was down to 2 inches from the bottom, only a slit was open. I was 3 feet from the door inside wearing a blue ski jacket. I heard a bang and looked back in mid stride. All I saw in the room was a white cloud. I ran for the door. I got out and watched the fume hood flue puff red and white smoke for 5 minutes in great clouds. The inside of the lab was opaque for that time in white smoke. I took off the navy ski jacket and the back had been bleached pure white in a half second. If anyone had been in the back room in the lab they would have been dead in 3 seconds. That was 40 mils and the fume hood window was closed almost shut with an open area of perhaps one half square foot. That filled the lab in perhaps one second, a volume of 600 cubic feet. If that seems to violate the PV=nRT, remember that the gas temperature of that mere two moles of this stuff when it went bang would be about 250 degrees or more.

EC<:-}
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